Megafield

Megafield is a nonstandard term used to describe an exceptionally large physical field, most often a magnetic field, but it may also refer to strong gravitational or other fundamental fields in theoretical discussions. It is not an official scientific quantity and has no universally accepted numerical threshold.

In physics and astrophysics, megafield generally implies field strengths on the order of 10^6 tesla or greater. Such values are far beyond current laboratory capabilities; typical lab magnets reach tens of tesla. By contrast, astrophysical objects like magnetars are believed to possess fields around 10^8–10^11 tesla, illustrating the scale relative to a megafield concept.

Because megafield is informal, it appears mainly in speculative contexts, popular science writing, or illustrative simulations rather than formal measurement reports. In precise work, researchers use specific quantities such as tesla to express the exact field strength or refer to related terms like megatesla or megagauss when appropriate.

See also: magnetic field, magnetar, strong-field physics, megagauss, megatesla.